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Clinical trial Recruiting at 1 site Observational Ages 18 to 100

Observing HIV infection risks among high-risk individuals in Vienna

Official title: Characterization of Patients at High Risk for the Acquisition of Sexually Transmitted Infection With the Human Immunodeficiency Virus (HIV) - a Clinical Study

Run by Medical University of Vienna · NCT05326061 · Data updated 2026-11-12

This study looks at the risk factors for new HIV infections among HIV-negative men who have sex with men and transgender individuals in Vienna to better understand how the virus spreads in these groups.

Quick facts

Study typeObservational
Ages18 Years to 100 Years
SexAll
Enrollment500 (estimated)
SponsorMedical University of Vienna
Academic / other
Locations1 site (Vienna)
StatusRecruiting
StartedJuly 1, 2020
Main results expectedDecember 2030
Study endsDecember 2030
Registry record updatedApril 13, 2022
Trial IDNCT05326061 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are HIV-negative MSM and transgender individuals over 18 years old who engage in high-risk sexual practices.

Probably not a fit

Patients who consistently use condoms and do not engage in high-risk behaviors may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational cohort study aims to investigate the epidemiology and risk factors associated with new HIV infections among individuals at high risk, specifically HIV-negative men who have sex with men (MSM) and transgender individuals. Participants will be assessed for high-risk behaviors, including inconsistent condom use, recent sexually transmitted infections (STIs), and engagement in chemsex. Clinical data will be collected through laboratory tests and questionnaires to understand the incidence of HIV and related conditions. The study will provide valuable insights into the transmission dynamics of HIV in this vulnerable population.

Why it matters

Potential benefit: If successful, this study could lead to improved prevention strategies and targeted interventions for individuals at high risk of HIV infection.

How similar studies have gone: Other studies have shown success in understanding HIV transmission dynamics among high-risk populations, making this approach both relevant and necessary.

Who can join: the full rules

Show full inclusion / exclusion criteria 
Inclusion Criteria:

1. High risk for acquiring HIV defined as followed: HIV-negative MSM and transgender individuals who (i) do not use condoms consistently with casual partners and/or with HIV-positive partners who are not on treatment and/or (ii) recently acquired an STI and/or (iii) recently used PEP and/or (iv) frequently engage in 'chemsex'.
2. Age \>18 years and \<100 years.
3. Written informed consent for this registry study.

Exclusion Criteria:

1\. Withdrawal of the written informed consent.

Where it's running

  • Medical University of Vienna
    Vienna, Austria     Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
View on ClinicalTrials.gov ↗ Find more trials like this →
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Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.